Lien&#39;s bow

ABSTRACT

A bow includes a rigid bow frame having two ends and defining a longitudinal axis between two ends; a tension unit including an elastic cable extended between the ends of the bow frame, wherein the elastic cable is extended at a rear side of the bow frame along the longitudinal axis thereof; and a guidance unit provided at a middle of the bow frame for setting said arrow at a position that a rear end of the arrow is biased against a middle of the elastic cable, wherein the elastic cable is drawn back to build tension thereof for shooting the arrow.

BACKGROUND OF THE PRESENT INVENTION

1. Field of Invention

The present invention relates to a bow, and more particular to anarchery bow which comprises an elastic cable adjustably affixed to a bowframe, wherein a tension of the elastic cable can be selectivelyadjusted to control the trajectory of the arrow.

2. Description of Related Arts

A bow-and-arrow apparatus is a projectile weapon and is commonly usedfor hunting and for the sport of archery. A conventional archery bowgenerally comprises an elongated flexible frame defining a pair ofelastic limbs, and a non-elastic bow string affixed to two ends of theflexible frame, wherein when the string is drawn back, the flexibleframe is flexed at two ends thereof. The arrow is set at the middle ofthe flexible frame, wherein the arrow is drawn back to build tension onthe flexible frame. In other words, the user is able to hold back thefull tension of the flexible frame while aiming. Therefore, when thestring is released, the potential energy of the flexed flexible frame,i.e. the restoring force thereof, is transformed into the velocity ofthe arrow. However, the conventional archery bow has several drawbacks.

It is generally considered to be difficult for the user to shoot thearrow accurately. When the flexed flexible frame is flexed and releasedfrom a firing position back to an original position, vibration will begenerated at the bow shaft so as to cause the undesirably deflection ofthe arrow. In addition, since the string is affixed at two ends of theflexible frame, the flexing forces at two ends of the flexible framewith respect to the center thereof will not be even. In other words, therestoring forces at the elastic limbs are not even. Furthermore, theposition of the arrow cannot be ensured at a corrected position at thestring that the rear end of the arrow may not be retained at a center ofthe string.

Accordingly, the conventional archery bow must incorporate with thearrow having a nock at the rear end and a fletching element at the rearportion of the arrow. In addition, a ledge must be provided at theflexible frame to support the arrow. However, when the string isreleased, the ledge at the flexible frame will not guarantee thecorrected shooting alignment of the arrow.

The assembling operation of the conventional archery bow is relativelycomplicated. In order to assemble the archery bow, the user mustsecurely affix the string to two ends of the flexible frame and mustensure the tension of the string. Since the flexible frame can beflexed, the user must apply a relatively bending force to flex theflexible frame before the string is affixed thereto. In other words, theuser must strong enough to flex the flexible frame until the distancebetween the two ends thereof can fit to the length of the string.

SUMMARY OF THE PRESENT INVENTION

The invention is advantageous in that it provides a Lien's bow-and-arrowapparatus, which is a newly structural design of the bow-and-arrowapparatus as an improvement of the conventional bow.

Another advantage of the invention is to provide a bow-and-arrow whichcomprises an elastic cable adjustably affixed to a rigid bow frame.

Another advantage of the invention is to provide a bow, wherein theelastic cable is extended and encircled at the ends of the bow frame toaffix the ends of the elastic cable at the front side of the bow frame,so as to evenly distribute the tension of the elastic cable at theentire bow frame.

Another advantage of the invention is to provide a bow, wherein thetension of the elastic cable is selectively adjusted to control thetrajectory of the arrow.

Another advantage of the invention is to provide a bow, wherein theguiding barrel is adapted to guide the shooting direction of the arrow.

Another advantage of the invention is to provide a bow, wherein thedeflection control portion of the guiding barrel is selectively adjustedto minimize the deflection of the arrow when the elastic cable isreleased at the firing position.

Another advantage of the invention is to provide a bow, wherein the useris able to grip the handle to precisely aim to the target.

Another advantage of the invention is to provide a bow, wherein theassembling operation of the bow is easy and simple that the user is ableto easily replace or change the elastic cable from the bow frame.

Additional advantages and features of the invention will become apparentfrom the description which follows, and may be realized by means of theinstrumentalities and combinations particular point out in the appendedclaims.

According to the present invention, the foregoing and other objects andadvantages are attained by a bow for a trajectory of an arrow,comprising:

a rigid bow frame having two ends and defining a longitudinal axisbetween the two ends;

a tension unit which comprises an elastic cable extended between theends of the bow frame, wherein the elastic cable is extended at a rearside of the bow frame along the longitudinal axis thereof; and

a guidance unit provided at a middle of the bow frame for setting thearrow at a position that a rear end of the arrow is biased against amiddle of the elastic cable, wherein the elastic cable is drawn back tobuild tension thereof for shooting the arrow.

Still further objects and advantages will become apparent from aconsideration of the ensuing description and drawings.

These and other objectives, features, and advantages of the presentinvention will become apparent from the following detailed description,the accompanying drawings, and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a Lien's bow-and-arrow apparatusaccording to a preferred first embodiment of the present invention.

FIG. 2 is a top view of the bow-and-arrow apparatus according to theabove first preferred embodiment of the present invention.

FIG. 3 is a partially front view of the bow-and-arrow apparatusaccording to the above first preferred embodiment of the presentinvention, illustrating the structure of the retaining slot of the bowframe.

FIG. 4 illustrates the position of the guiding barrel at the bow frameof the bow-and-arrow apparatus according to the above first preferredembodiment of the present invention, illustrating the deflection angleof the guiding barrel.

FIG. 5 is a perspective view of the handle of the bow-and-arrowapparatus according to the above first preferred embodiment of thepresent invention, illustrating the non-circular cross section of thehandle.

FIG. 6 illustrates the holding position of the bow-and-arrow apparatusaccording to the above first preferred embodiment of the presentinvention.

FIG. 7 is a perspective view of a Lien's bow-and-arrow apparatusaccording to a preferred second embodiment of the present invention.

FIG. 8 is a front view of the bow-and-arrow apparatus according to theabove second preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

Referring to FIGS. 1 and 2 of the drawings, a Lien's bow-and-arrowapparatus according to a preferred first embodiment of the presentinvention is illustrated, wherein the bow-and-arrow apparatus comprisesa Lien's arrow 10 and a Lien's bow.

The arrow 10 is a non fletching type arrow and comprises an elongatedshaft 11 and defining an arrow head 12 and a rear end 13. Preferably,the rear end 13 of the arrow 10 is a round end. Accordingly, there is nofletching element provided at the shaft 11 of the arrow 10.

The bow comprises a rigid bow frame 20 having two ends 21 and defining alongitudinal axis between the two ends 21, and a tension unit 30 whichcomprises an elastic cable 31 extended between the ends 21 of the bowframe 20, wherein the elastic cable 31 is extended at a rear side of thebow frame 20 along the longitudinal axis thereof.

The bow further comprises a guidance unit 40 provided at a middle of thebow frame 20 for setting the arrow 10 at a position that the rear end ofthe arrow 10 is biased against a middle of the elastic cable 31, whereinthe elastic cable 31 is drawn back to build tension thereof for shootingthe arrow 10. As show in FIG. 1, the elastic cable 31 has an elongatedflat structure defining a flat surface 311 for the rear end 13 of thearrow 10 biasing thereat, wherein the flat surface 311 of the elasticcable 31 faces toward the rear side of the bow frame 20. In other words,the width of the elastic cable 31 is substantially larger than athickness of the elastic cable 31 to form a flat configuration.Preferably, the width of the flat surface 311 of the elastic cable 31 islarger than a diameter of the rear end 13 of the arrow 10.

According to the preferred embodiment, the arrow 10 further has a notch14 formed at the rear portion of the shaft 11, and a coarse surface 15provided at the outer circumferential surface of the shaft 11.

According to the preferred embodiment, the bow frame 20 is formed as ahorizontal bow that the ends 21 of the bow frame 20 are defined at thetwo side ends of the bow frame 20, wherein the elastic cable 31 isextended between the side ends of the bow frame 20. The bow frame 20 hasa pair of identical bow wings 22 and defines the ends 21 thereat, and acenter through slot 23 formed at the middle of the bow frame 20, i.e.the middle of the bow wings 22. Preferably, the bow frame 20 is made ofrigid and light weight material such as metal or wood, that the bowframe 20 does not provide any flexibility with respect to the arrow 10.

The tension unit 30 further comprises a securing unit 32 formed at afront side of the bow frame 10, and two locking units 33 provided at twoends of the elastic cable 31 to couple with the securing unit 32, suchthat the two ends of the elastic cable 31 are extended and encircled atthe two ends 21 of the bow frame 20 to affix at the front side of thebow frame 10. Accordingly, the two ends of the elastic cable 31 areaffixed to the front side of the bow wings 22 of the bow frame 20respectively. It is worth mentioning that since the elastic cable 31 isnot directly affixed to the ends 21 of the bow frame 20, the tension ofthe elastic cable 31 will not be directly applied at the ends of the bowframe 20 only. In other words, the elastic cable 31 is extended from thefront side of the bow frame 10 to the rear side thereof through the twoends 21, the tension of the elastic cable 31 will evenly apply to theentire bow frame 10 so as to ensure the even tension being built at theelastic cable 21 when the elastic cable 21 is drawn backwardly.

As shown in FIGS. 2 and 3, the securing units 32 has a plurality ofsecuring slots 321 spacedly formed at the front side of the bow frame10. Preferably, the securing slots 321 are evenly formed at the frontside of the bow wings 22 respectively.

Each of the locking units 33 comprises two tension adjusters 331selectively engaged with two of the securing slots 321 and two cablelockers 332 provided at the two ends of the elastic cable 31 anddetachably coupled with the two tension adjusters 331 to selectivelycontrol the tension of the elastic cable 31 between the two ends 21 ofthe bow frame 10. Accordingly, when the two tension adjusters 331 areengaged with two securing slots 321 located close to the center throughslot 23, i.e. close to the middle of the bow frame 20, the elastic cable31 will be stretched out more to more tensionally prolong the lengththereof. Therefore, the tension of the elastic cable 31 between the twoends 21 of the bow frame 10 will be increased. Likewise, when the twotension adjusters 331 are engaged with two securing slots 321 locatedclose to the two ends 21 of the bow frame 10, the elastic cable 31 willbe stretched out lesser to less tensionally prolong the length thereof.Therefore, the tension of the elastic cable 31 between the two ends 21of the bow frame 10 will be reduced.

As shown in FIG. 2, each of the tension adjusters 331 is selectively,detachably, and securely engaged one of the securing slots 321. Thecable locker 332, preferably having a ring shape, securely affixed tothe respective end of the elastic cable 31 to detachably couple with thetension adjusters 331. It is worth mentioning that the tension adjusters331 should be engaged the corresponding securing slots 321 in pair atthe bow wings 22 of the bow frame 20 to evenly distribute the tension ofthe elastic cable 31 at the bow frame 20. For example, when one of thetension adjusters 331 is engaged with the securing slot 321 at one bowwing 22 of the bow frame 20 closest to the center through slot 23,another tension adjusters 331 should be engaged with the securing slot321 at another bow wing 22 of the bow frame 20 closest to the centerthrough slot 23. In other words, the length of the end portion of theelastic cable 31 at front side of one bow wing 22 of the bow frame 20should be the same as the length of the end portion of the elastic cable31 at front side of another bow wing 22 of the bow frame 20.

It is worth mentioning that the tension adjusters 331 can be directlyaffixed to the ends of the elastic cable 31 to selectively, detachably,and securely engage two of the securing slots 321, wherein the cablelockers 332 can be omitted. Likewise, the cable lockers 332 can beintegrally formed at the ends of the elastic cable 31 to detachablycouple with the tension adjusters 331.

In order to ensure the elastic cable 31 being encircled at the two ends21 of the bow frame 20, the bow frame 20 further comprises two retainingslots 24 formed at the two ends 21 of the bow frame 20, wherein two endportions of the elastic cable 31 are slid into the retaining slots 24respectively in order to affix the two ends of the elastic cable 31 atthe front side of the bow frame 20.

As shown in FIGS. 2 and 3, the retaining slots 24 are formed at the twoends 21 of the bow frame 20 along the longitudinal axis thereof. Each ofthe retaining slots 24 has an outer narrowing portion 241 extended fromthe respective end 21 of the bow frame 20 and an inner enlarged portion242 extended from the narrowing portion 241. The narrowing portion 241of the retaining slot 24 is an opened end slot along the longitudinalaxis, wherein the opening of the narrowing portion 241 of the retainingslot 24 is formed at the sidewall of the respective end 21 of the bowframe 20. In particular, the narrowing portion 241 of the retaining slot24 has a uniform width that the sidewalls of the narrowing portion 241of the retaining slot 24 are extended parallelly. Accordingly, the widthof the narrowing portion 241 of the retaining slot 24 is smaller thanthe width of the elastic cable 31.

The enlarged portion 242 of the retaining slot 24 is a closed end slot,wherein the enlarged portion 242 of the retaining slot 24 has a circularshape and defines an inner curved surface thereat. The diameter of theenlarged portion 242 of the retaining slot 24, i.e. the width thereof,is larger than the width of the narrowing portion 241 of the retainingslot 24. However, the diameter of the enlarged portion 242 of theretaining slot 24 is smaller than the width of the elastic cable 31.Therefore, when the elastic cable 31 is slid into the enlarged portion242 of the retaining slot 24 through the narrowing portion 241 thereof,the elastic cable 31 is frictionally engaged with the inner curvedsurface of the enlarged portion 242 of the retaining slot 24 so as tofrictionally retain the elastic cable 31 at the respective end 21 of thebow frame 20. In other words, the flat surface 311 of the elastic cable31 will be deformed to form a curved configuration when the flat surface311 of the elastic cable 31 is frictionally engaged with the innercurved surface of the enlarged portion 242 of the retaining slot 24.

Since the elastic cable 31 is frictionally engaged with the two ends ofthe bow frame 20, the tension of the elastic cable 31 can be furtherselectively controlled. Accordingly, when the elastic cable 31 is pulledfrom the front side of the bow frame 20, i.e. pulling the end portionsof the elastic cable 31 between the ends thereof and the ends 21 of thebow frame 20, the elastic cable 31 will be frictionally slid at theinner curved surface of the enlarged portion 242 of the retaining slot24 toward the front side of the bow frame 20. Therefore, the elasticcable 31 will be further stretched between the ends 21 of the bow frame20 to increase the tension of the elastic cable 31. When the elasticcable 31 is pulled from the rear side of the bow frame 20, i.e. pullingthe mid-portion of the elastic cable 31 between the ends 21 of the bowframe, the elastic cable 31 will be frictionally slid at the innercurved surface of the enlarged portion 242 of the retaining slot 24toward the rear side of the bow frame 20. Therefore, the elastic cable31 will be less stretched between the ends 21 of the bow frame 20 toreduce the tension of the elastic cable 31.

It is worth mentioning that the user is able to replace or change theelastic cable 31 rapidly by detaching the cable lockers 332 from thetension adjusters 331 and removing the elastic cable 31 from theretaining slots 24.

According to the preferred embodiment, the guidance unit 40 comprises atubular guiding barrel 41 transversely extended from the bow frame 20.In particular, the guiding barrel 41 is perpendicularly extended at themiddle of the bow frame 20 for slidably loading the arrow 10 within theguiding barrel 41. In particular, the guiding barrel 41 is slidablyextended through the center through slot 23 of the bow frame 20. Adiameter of the guiding barrel 41 is slightly larger than a diameter ofthe arrow 10. Accordingly, a rear portion of the guiding barrel 41 isrearwardly extended out of the rear side of the bow frame 20 to form adeflection control portion of the guiding barrel 41. A front portion ofthe guiding barrel 41 is frontwardly extended out of the front side ofthe bow frame 20 to form a guidance control portion of the guidingbarrel 41.

The guiding barrel 41 has a length shorter than the length of the arrow10. However, the length of the guiding barrel 41 is substantially longerthan the distance between the front and rear sides of the bow frame 20.Therefore, when the arrow 10 is loaded at the guiding barrel 41, thearrow 10 can be held and supported at the bow frame 20. It is worthmentioning that when the bow frame 20 is retained at a horizontalposition or at a rearward tilt position, the arrow 10 will be held bythe guiding barrel 41 and will not be dropped out from the bow frame 20.Only when the bow frame 20 is held at a front tilt position, the arrow10 may slid out of the guiding barrel 41. Therefore, the guiding barrel41 will also hold the arrow 10 at the bow frame 20 in position.

It is worth mentioning that the rear end of the guiding barrel 41 isaligned with and pointed at the middle of the elastic cable 31 betweenthe two ends 21 of the bow frame 20. Therefore, when the arrow 10 isloaded at the guiding barrel 41, the rear end 13 of the arrow 10 will beautomatically slid out of the rear end of the guiding barrel 41 andbiased against the middle of the elastic cable 31. Therefore, the useris able to simply hold and drawn the rear end 13 of the arrow 10backward that the rear end 13 of the arrow 10 will be automaticallylocated the middle of the elastic cable 31. It is important that whenthe elastic cable 31 is drawn backward, the tension of the elastic cable31 will be built evenly at the middle thereof towards the ends 21 of thebow frame 20. Therefore, when the elastic cable 31 is released, thetension of the elastic cable 31 will be evenly applied to the arrow 10to shoot the arrow 10 correctly.

Accordingly, a rear end of the guiding barrel 41 is rearwardly extendedfrom the bow frame 20 at the rear side thereof at a position that therear end 13 of the arrow 10 is rearwardly extended out of the rear endof the guiding barrel 41 to bias against the elastic cable 31.Therefore, the use is able to hold the rear end 13 of the arrow 10 andto draw the elastic cable 31 backward at the same time as a firingposition. In particular, the guiding barrel 41 is selectively adjusted adistance between the rear end of the guiding barrel 41 and the elasticcable 31.

In particular, when the arrow 10 is loaded at the guiding barrel 41, thenotch 14 of the arrow 10 is extended out of the rear end of the guidingbarrel 41. Therefore, the user is able to feel and hold the notch 14 ofthe arrow 10 in order to draw the rear end 13 of the arrow 10 with theelastic cable 31 backward at the same time. The coarse surface 15 of thearrow 10 will provide enough friction in order for the user to hold therear end 13 of the arrow 10 tightly.

As shown in FIG. 2, the guiding barrel 41 has an outer threaded portionto rotatably engage with an inner threaded portion of the center throughslot 23 of the bow frame 20. Therefore, the distance between the rearend of the guiding barrel 41 and the elastic cable 31 can be selectivelyadjusted. In other words, the deflection control portion of the guidingbarrel 41 can be selectively controlled as shown in FIG. 4.

When the guiding barrel 41 is rotated at one direction to increase thelength of the deflection control portion of the guiding barrel 41, thedistance between the rear end of the guiding barrel 41 and the elasticcable 31 will be reduced. Likewise, when the guiding barrel 41 isrotated at the opposed direction to decrease the length of thedeflection control portion of the guiding barrel 41, the distancebetween the rear end of the guiding barrel 41 and the elastic cable 31will be increased.

As shown in FIG. 4, the deflection control portion of the guiding barrel41 is arranged to control a deflection angle for the arrow 10, whereinthe deflection angle is defined at the middle of the bow frame 20 andthe opening width of the rear end of the guiding barrel 41. Accordingly,when the length of the deflection control portion of the guiding barrel41 is increased, the deflection angle Θ1 will be reduced so as tominimize the deflection of the arrow 10 when the elastic cable 31 isreleased at the firing position. When the length of the deflectioncontrol portion of the guiding barrel 41 is decreased, the deflectionangle Θ2 will be increased. By comparing the different positions of thedeflection control portion of the guiding barrel 41 in FIG. 4, thedeflection angle Θ1 and the deflection angle Θ2 will be changed, whereinthe deflection angle Θ1 is smaller than the deflection angle Θ2.Therefore, the user is able to adjust the deflection angle byselectively adjusting the position of the guiding barrel 41 with respectto the bow frame 20. It is worth mentioning that the deflection controlportion of the guiding barrel 41 cannot be further extended from therear side of the bow frame 20 to contact the rear end of the guidingbarrel 41 with the elastic cable 31. In fact, the maximum length of thedeflection control portion of the guiding barrel 41 is controlled thatthe elastic cable 31 is released after the elastic cable 31 is drawnbackward, the elastic cable 31 will not bound back to hit the rear endof the guiding barrel 41. In other words, the elastic cable 31 will notcontact with the rear end of the guiding barrel 41 at anytime. If theelastic cable 31 is released to hit the rear end of the guiding barrel41, the elastic cable 31 will be damaged. After the elastic cable 31 isrepeatedly hit the rear end of the guiding barrel 41, the elastic cable31 will be broken. Therefore, the deflection control portion of theguiding barrel 41 should not be further extended from the rear side ofthe bow frame 20 to prevent the elastic cable 31 hitting at the rear endof the guiding barrel 41 so as to prolong the service life span of theelastic cable 31.

The guidance unit 40 further comprises a front locker 42 and a rearlocker 43 to lock up the guiding barrel 41 at the bow frame 20. Thefront locker 42, preferably a ring shaped locker being actuated by hand,is coaxially coupled at the guiding barrel 41 at the front side of thebow frame 20. The front locker 42 has an inner threaded portionrotatably engaged with the outer threaded portion of the guiding barrel41. Likewise, the rear locker 43, preferably a ring shaped locker beingactuated by hand, is coaxially coupled at the guiding barrel 41 at therear side of the bow frame 20. The rear locker 43 has an inner threadedportion rotatably engaged with the outer threaded portion of the guidingbarrel 41. Therefore, once the position of the guiding barrel 41 isadjusted and set, the user is able to rotate the front and rear lockers42, 43 by hand to lock up the guiding barrel 41.

Furthermore, the guidance unit 40 further comprises a front protectivecap 44, having a tubular shape, coaxially coupled at the front end ofthe guiding barrel 41. Accordingly, the front protective cap 44 iscoupled at the outer circumferential side of the guiding barrel 41,wherein when the bow is accidentally dropped on the ground, the frontend of the guiding barrel 41 may be bent or broken. Then, the arrow 10cannot be loaded at the guiding barrel 41 or cannot be shot accurately.The front protective cap 44 will protect the front end of the guidingbarrel 41. In addition, the front protective cap 44 further has anaiming member 441 protruded upwardly and aligned with the shootingdirection of the arrow 10, i.e. the alignment of guiding barrel 41. Itis worth mentioning that the arrow 10 will be guided to shoot along theguiding barrel 41. The arrow 10 will leave the guiding barrel 41 at thefront end thereof. Therefore, the aiming member 441 will guide the userto aim the target properly.

According to the preferred embodiment, the bow further comprises ahandle 50, having a non-circular cross section, transversely extendedfrom the bow frame 20 for the user to hold the bow frame 20. Inparticular, the handle 50 is perpendicularly and downwardly extendedfrom the middle of the bow frame 20 to form a T-shaped configuration.Accordingly, the user is able to use one hand to grip the handle 50 andanother hand to draw the elastic cable 31 and the rear end 13 of thearrow 10 backward. The user is also able to locate the bow frame 20different positions via the handle 50 that the bow frame 20 can be heldat the horizontal position, the vertical position, or a slantedposition, as shown in FIG. 6.

As shown in FIG. 5, the handle 50 comprises an elongated palm grippingmember 51 and an elongated finger gripping member 52 provided at a frontside of the gripping member 51, wherein each of the palm gripping member51 and the finger gripping member 52 has a non-circular cross section.In addition, a width of the palm gripping member 51 is larger than awidth of the finger gripping member 52.

Preferably, the palm gripping member 51 has a rectangular cross sectiondefining two cornering edges 511, wherein when the hand of the usergrips at the palm gripping member 51, the two cornering edges 511 of thepalm gripping member 51 will biased against the palm of the user's hand.The finger gripping member 52 generally has a rectangular cross sectionbut forms a curved front surface 521 for matching with the curvature ofthe fingers of the user's hand when the fingers thereof press againstthe finger gripping member 52. It is worth mentioning that if the handle50 has a circular cross section, the user's hand may grip at thecircular handle without any proper gripping position. The arrow 10 maybe slightly pointed sidewardly via the guiding barrel 41 when thecircular handle is slightly turned and gripped by the user's hand.Therefore, when the two cornering edges 511 of the palm gripping member51 are biased against the palm of the user's hand, the user can feel theproper gripping position of the handle 50. In other words, when thehandle 50 is slightly turned, the two cornering edges 511 of the palmgripping member 51 will biased against different locations of the palmof the user's hand that the user can feel the slightly change of thedirection of the arrow 10. It is worth mentioning that the handle 50will provide a three-point alignment, i.e. the two cornering edges 511of the palm gripping member 51 and the apex of the curved front surface521 of the finger gripping member 52, when the handle 50 is gripped bythe user's hand.

Furthermore, the palm gripping member 51 further has a T-shapedconfiguration and defines two supporting surfaces 512 resting on thethumb and the index finger of the user's hand when the handle 50 isgripped. The supporting surfaces 512 will to ensure the bow frame 20being stably held by the user's hand. Also, the supporting surfaces 512of the palm gripping member 51 will ensure the distance between theuser's hand and the bow frame 20 to prevent the backward drawn elasticcable 31 being blocked by the user's hand.

According to the preferred embodiment, the bow further comprises aweighting member 60 mounted on the middle of the bow frame 20 on a topside thereof to align with the handle 50 to substantially apply adownward weight force toward the handle 50. The weight force of theweighting member 60 will ensure the balance of the bow frame 20 betweenthe two bow wings 22 when the handle 50 is gripped at the user's hand.The weighting member 60 further has an aiming guide 61 aligned with theguidance unit 40 for enabling the user to aim the target. Accordingly,the weighting member 60 has a flat top surface, wherein the aiming guide61 is an indented groove, preferably having a V-shape, formed at theflat top surface of the weighting member 60, wherein the aiming guide 61is located at the middle of the bow frame 20 that perpendicular to thelongitudinal axis thereof and is aligned with the guiding barrel 41. Inaddition, the aiming guide 61 is also aligned with the aiming member 441of the front protective cap 44 to form a double-aiming guide forshooting the arrow 10.

In order to assembly the bow of the present invention, the user is ableto selectively engage the tension adjusters 331 with two of the securingslots 321 in pair at the bow wings 22 of the bow frame 20 forcontrolling the tension of the elastic cable 31. Then, the user is ableto slide the elastic cable 31 into the retaining slots 24 such that theelastic cable 31 will frictionally engage with the inner curved surfacesof the enlarged portions 242 of the retaining slots 24. The user willthen able to detachably couple the two cable lockers 332 with the twotension adjusters 331 respectively. By pulling the elastic cable 31 fromeither the front side or the rear side of the bow frame 20, the tensionof the elastic cable 31 can be further fine-adjusted between the twoends 21 of the bow frame 20.

In order to use the present invention, the user is able to load thearrow 10 at the guiding barrel 41 from the front opening end thereofOnce the bow frame 20 is tilted to backward, the arrow 10 will be slidbackward at a position that the rear end 13 of the arrow 10 willautomatically biased against the middle of the elastic cable 31. It isworth mentioning that the notch 14 of the arrow 10 is extended out ofthe rear end of the guiding barrel 41. Therefore, the user is able tohold the notch 14 of the arrow 10 in order to draw the rear end 13 ofthe arrow 10 with the elastic cable 31 backward at the same time tobuild the tension of the elastic cable 31. When the elastic cable 31 isreleased, the tension of the elastic cable 31 will be transformed into ashooting force to shoot the arrow 10 out of the guiding barrel 41.

As shown in FIGS. 7 and 8, a Lien's bow according to a second embodimentillustrates an alternative mode of the first embodiment, wherein thestructural configuration of the bow of the first embodiment is similarto that of the second embodiment except the handle 50′.

According to the second embodiment, the handle 50′, having anon-circular cross section, is integrally extended from one of the ends21 of the bow frame 20 along the longitudinal axis thereof to form anelongated configuration. In other words, the bow frame 20 is formed as avertical bow that the ends 21 of the bow frame 20 are defined at thebottom end and the top end of the bow frame 20, wherein the elasticcable 31 is extended between the top and bottom ends of the bow frame20. Preferably, the handle 50′ is integrally extended from the bottomend 21 of the bow frame 20.

The handle 50′ has a rectangular cross section defining two corneringedges 501′, wherein when the hand of the user grips at the handle 50′,the two cornering edges 501′ of the handle 50′ will biased against thepalm of the user's hand.

One of the retaining slots 24 is formed at the top end 21 of the bowframe 20 while another retaining slot 24 is formed at the bottom end 21of the bow frame 20, wherein two end portions of the elastic cable 31are slid into the retaining slots 24 respectively in order to affix thetwo ends of the elastic cable 31 at the front side of the bow frame 20.

The retaining slot 24 at the top end 21 of the bow frame 20 is formedalong the longitudinal axis thereof. The retaining slot 24 at the bottomend 21 of the bow frame 20 is formed perpendicular to the longitudinalaxis thereof. It is worth mentioning that each of the retaining slots 24also has the outer narrowing portion 241 and the inner enlarged portion242. The enlarged portions 242 of the two retaining slots 24 are alignedwith the longitudinal axis of the bow frame 20. In other words, thenarrowing portion 241 of the retaining slot 24 at the top end 21 of thebow frame 20 is upwardly extended to form a top opening of the retainingslot 24. The narrowing portion 241 of the retaining slot 24 at thebottom end 21 of the bow frame 20 is sidewardly extended to form a sideopening of the retaining slot 24.

The weighting member 60′ is mounted on the top end 21 of the bow frame20 to align with the handle 60′. Preferably, two weighting member 60′are mounted at two opposed sidewalls of the top end 21 of the bow frame20 to keep the balance of the bow frame 20 when the handle 60′ isgripped by the user's hand.

According to the present invention, the arrow 10 can be formed to have asharp arrow head 12 for professional use. It would be formed as asuction cup head as a toy for young child to play with.

One skilled in the art will understand that the embodiment of thepresent invention as shown in the drawings and described above isexemplary only and not intended to be limiting.

It will thus be seen that the objects of the present invention have beenfully and effectively accomplished. It embodiments have been shown anddescribed for the purposes of illustrating the functional and structuralprinciples of the present invention and is subject to change withoutdeparture from such principles. Therefore, this invention includes allmodifications encompassed within the spirit and scope of the followingclaims.

What is claimed is:
 1. A bow for a trajectory of an arrow, comprising: arigid bow frame having two ends and defining a longitudinal axis betweensaid two ends; a tension unit which comprises an elastic cable extendedbetween said ends of said bow frame, wherein said elastic cable isextended at a rear side of said bow frame along said longitudinal axisthereof; and a guidance unit provided at a middle of said bow frame forsetting said arrow at a position that a rear end of said arrow is biasedagainst a middle of said elastic cable, wherein said elastic cable isdrawn back to build tension thereof for shooting said arrow.
 2. The bow,as recited in claim 1, wherein said elastic cable has an elongated flatstructure defining a flat surface for said rear end of said arrowbiasing thereat.
 3. The bow, as recited in claim 1, wherein said tensionunit further comprises a securing unit formed at a front side of saidbow frame, and two locking units provided at two ends of said elasticcable to couple with said securing unit, such that said two ends of saidelastic cable are extended and encircled at said two ends of said bowframe to affix at said front side of said bow frame.
 4. The bow, asrecited in claim 3, wherein said bow frame further comprises tworetaining slots formed at said two ends of said bow frame, wherein twoend portions of said elastic cable are slid into said retaining slotsrespectively in order to affix said two ends of said elastic cable atsaid front side of said bow frame.
 5. The bow, as recited in claim 4,wherein each of said retaining slots has an outer narrowing portionextended from said respective end of said bow frame and an innerenlarged portion extended from said narrowing portion, wherein saidnarrowing portion of said retaining slot has a uniform width, whereinsaid enlarged portion of said retaining slot has a circular shape andhas a diameter larger than said width of said narrowing portion andsmaller than a width of said elastic cable, such that when said elasticcable is slid into said enlarged portion of said retaining slot throughsaid narrowing portion thereof, said elastic cable is frictionallyengaged with an inner curved surface of said enlarged portion of saidretaining slot so as to frictionally retain said elastic cable at saidrespective end of said bow frame.
 6. The bow, as recited in claim 3,wherein said securing units has a plurality of securing slots spacedlyformed at said front side of said bow frame, wherein each of saidlocking units comprises two tension adjusters selectively engaged withtwo of said securing slots and two cable lockers provided at said twoends of said elastic cable and detachably coupled with said two tensionadjusters to selectively control said tension of said elastic cablebetween said two ends of said bow frame.
 7. The bow, as recited in claim1, wherein said guidance unit comprises a tubular guiding barrelperpendicularly extended at the middle of said bow frame for slidablyloading said arrow within said guiding barrel, wherein a rear end ofsaid guiding barrel is rearwardly extended from said bow frame at saidrear side thereof at a position that said rear end of said arrow isrearwardly extended out of said rear end of said guiding barrel to biasagainst said elastic cable.
 8. The bow, as recited in claim 7, whereinsaid bow frame has a center through slot formed at the middle of saidbow frame, wherein said guiding barrel is slidably extended through saidcenter through slot and is selectively adjusted a distance between saidrear end of said guiding barrel and said elastic cable.
 9. The bow, asrecited in claim 1, further comprising a handle, having a non-circularcross section, perpendicularly and downwardly extended from the middleof said bow frame to form a T-shaped configuration.
 10. The bow, asrecited in claim 9, wherein said handle comprises an elongated palmgripping member and an elongated finger gripping member provided at afront side of said gripping member, wherein a width of said palmgripping member is larger than a width of said finger gripping member,wherein each of said palm gripping member and said finger grippingmember has a non-circular cross section.
 11. The bow, as recited inclaim 10, wherein said palm gripping member has a T-shaped configurationand defines two supporting surfaces.
 12. The bow, as recited in claim 9,further comprising a weighting member mounted on the middle of said bowframe on a top side thereof to align with said handle, wherein saidweighting member has an aiming guide aligned with said guidance unit.13. The bow, as recited in claim 1, further comprising a handle, havinga non-circular cross section, integrally extended from one of said endsof said bow frame along said longitudinal axis thereof to form anelongated configuration.
 14. The bow, as recited in claim 13, furthercomprising a weighting member mounted on another end of said bow frameto align with said handle.
 15. A bow-and-arrow apparatus, comprising: anarrow, which is a non fletching type arrow, having an elongated shaftand defining an arrow head and a rear end; and a bow which comprises: arigid bow frame having two ends and defining a longitudinal axis betweensaid two ends; a tension unit which comprises an elastic cable extendedbetween said ends of said bow frame, wherein said elastic cable isextended at a rear side of said bow frame along said longitudinal axisthereof; and a guidance unit provided at a middle of said bow frame forsetting said arrow at a position that said rear end of said arrow isbiased against a middle of said elastic cable, wherein said elasticcable is drawn back to build tension thereof for shooting said arrow.16. The bow-and-arrow apparatus, as recited in claim 15, wherein saidelastic cable has an elongated flat structure defining a flat surfacefor said rear end of said arrow biasing thereat.
 17. The bow-and-arrowapparatus, as recited in claim 16, wherein said tension unit furthercomprises a securing unit formed at a front side of said bow frame, andtwo locking units provided at two ends of said elastic cable to couplewith said securing unit, such that said two ends of said elastic cableare extended and encircled at said two ends of said bow frame to affixat said front side of said bow frame.
 18. The bow-and-arrow apparatus,as recited in claim 17, wherein said tension unit further comprises asecuring unit formed at a front side of said bow frame, and two lockingunits provided at two ends of said elastic cable to couple with saidsecuring unit, such that said two ends of said elastic cable areextended and encircled at said two ends of said bow frame to affix atsaid front side of said bow frame.
 19. The bow-and-arrow apparatus, asrecited in claim 18, wherein said bow frame further comprises tworetaining slots formed at said two ends of said bow frame, wherein twoend portions of said elastic cable are slid into said retaining slotsrespectively in order to affix said two ends of said elastic cable atsaid front side of said bow frame.
 20. The bow-and-arrow apparatus, asrecited in claim 19, wherein said guidance unit comprises a tubularguiding barrel perpendicularly extended at the middle of said bow framefor slidably loading said arrow within said guiding barrel, wherein arear end of said guiding barrel is rearwardly extended from said bowframe at said rear side thereof at a position that said rear end of saidarrow is rearwardly extended out of said rear end of said guiding barrelto bias against said elastic cable.
 21. The bow-and-arrow apparatus, asrecited in claim 20, wherein said bow frame has a center through slotformed at the middle of said bow frame, wherein said guiding barrel isslidably extended through said center through slot and is selectivelyadjusted a distance between said rear end of said guiding barrel andsaid elastic cable.
 22. The bow-and-arrow apparatus, as recited in claim21, further comprising a handle, having a non-circular cross section,perpendicularly and downwardly extended from the middle of said bowframe to form a T-shaped configuration.
 23. The bow-and-arrow apparatus,as recited in claim 22, wherein said handle comprises an elongated palmgripping member and an elongated finger gripping member provided at afront side of said gripping member, wherein a width of said palmgripping member is larger than a width of said finger gripping member,wherein each of said palm gripping member and said finger grippingmember has a non-circular cross section.
 24. The bow-and-arrowapparatus, as recited in claim 23, further comprising a weighting membermounted on the middle of said bow frame on a top side thereof to alignwith said handle, wherein said weighting member has an aiming guidealigned with said guidance unit.